Water Hardness in Pekin, IL
Illinois · 1 zip codes · 8 matched water systems
City avg (weighted): 186 PPM
Dataset updated March 9, 20268 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Pekin, IL Water Hard or Soft?
The displayed hardness for Pekin, IL is 170 PPM (9.9 GPG) from Il American-Pekin, classified as moderately hard. The citywide weighted average is 186 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 8 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Pekin
These systems are matched to Pekin, IL. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Il American-Pekin IL1795040 | groundwater | 170 PPM Moderately HardUSGS estimate: 207 PPM | |
| East Peoria IL1790200 | groundwater | 170 PPM Moderately HardUSGS estimate: 600 PPM | |
| Morton IL1790500 | groundwater | 170 PPM Moderately HardUSGS estimate: 321 PPM | |
| Washington IL1790750 | groundwater | 170 PPM Moderately HardUSGS estimate: 321 PPM | |
| Marquette Heights IL1790400 | groundwater | 397 PPM Very Hard |
Zip Codes in Pekin, IL
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Pekin, IL.
Frequently Asked Questions
How hard is the water in Pekin, IL?
The citywide weighted average water hardness in Pekin, IL is 186 PPM (10.9 GPG), classified as hard. This is based on 8 matched water systems. The gauge highlights Il American-Pekin, a verified treated-water system, because individual systems can differ from the citywide average.
Do I need a water softener in Pekin, IL?
With a citywide average hardness of 186 PPM, a water softener is recommended for homes in Pekin. Confirm your tap reading before sizing equipment.
Is hard water in Pekin, IL safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Pekin, IL?
Pekin, Illinois is served by 8 matched water systems across 1 zip code.
Learn More About Your Water
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10 min readPPM to GPG Converter + Water Hardness Scale Explained
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